VEVOR Synthetic Winch Rope 3/8in x 100ft, Winch Line Cable with G70 Hook 18,740lbs Working Strength, 12 Strands, Synthetic Winch Cable w/Protective Sleeve, for Vehicles Towing, Blue

Safe Working strength is typically 1/3 to 1/4 of breaking strength. What is the breaking strength of this rope?

the working strength for this is 18740lbs. is that single line pull ? and would that be doubled if you doubled the line with a snatch block